Claude Code with Opus 4.6 regularly uses sed for multi-line edits, in my experience. On top of it, Pi is famously only exposing 4 tools, which is not just Bash, but far more constrained than CCs 57 or so tools.

So, yes, it can work.

I might have missed this in the docs, but is there a way to fork/clone a sprite, or restore a checkpoint into a new one?

Use cases: set up my preferred env in one sprite and use that as a template for others; or fire off a few independent sprites with claude code exploring alternative solutions, then choose a winner and reap the rest.